Thermodynamic and Adsorption Behaviour of Medicinal Nitramine as a Corrosion Inhibitor for AISI Steel Alloy in HCl Solution  

作　　者：Ali Reza Hosein Zadeh Iman Danaee Mohamad Hosein Maddahy 

机构地区：[1]Abadan Faculty of Petroleum Engineering,Petroleum University of Technology

出　　处：《Journal of Materials Science & Technology》2013年第9期884-892,共9页材料科学技术（英文版）

摘　　要：The inhibition ability of 2-amino-5-nitrothiazole （Nitramine） against the corrosion of AISI steel 4130 in 1 mol/L HCI solution was evaluated by polarization, electrochemical impedance spectroscopy （EIS） and chronoamperometry. Polarization studies indicated that nitramine retards both the cathodic and anodic reactions through chemical adsorption and blocks the active corrosion sites. The adsorption of this compound obeyed the Temkin＇s adsorption isotherm. The inhibition efficiency was increased with inhibitor concentration as well as temperature. EIS data were analysed by equivalent circuit model shows that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy and free energy of activation and adsorption were calculated. Atomic force microscopy and optical microscopy were used to study the steel surface with and without inhibitor.The inhibition ability of 2-amino-5-nitrothiazole （Nitramine） against the corrosion of AISI steel 4130 in 1 mol/L HCI solution was evaluated by polarization, electrochemical impedance spectroscopy （EIS） and chronoamperometry. Polarization studies indicated that nitramine retards both the cathodic and anodic reactions through chemical adsorption and blocks the active corrosion sites. The adsorption of this compound obeyed the Temkin＇s adsorption isotherm. The inhibition efficiency was increased with inhibitor concentration as well as temperature. EIS data were analysed by equivalent circuit model shows that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy and free energy of activation and adsorption were calculated. Atomic force microscopy and optical microscopy were used to study the steel surface with and without inhibitor.

关 键 词：Steel 4130 Corrosion INHIBITOR Adsorption isotherm Temkin 

分 类 号：O647.3[理学—物理化学] TG174.42[理学—化学]